I have now polygon files for the 5 digit zipcodes census tabulation areas
and am uploading them to archive.

http://fmtyewtk.blogspot.com/2009/12/shapfiles-for-nj-zcta-zip-code.html

The nice thing about these files is that they work just fine for the zip codes that I have looked out (long hill township 07933)

Using these polygons and the bounding boxes, we can split up the OSM file and
also check the tiger import. I found alot of missing zipcodes and even some that were wrong in the tiger import.

I will be creating OSM files from the NJ osm data from cloudmade next, so will spit the dump up by zipcode.

Also will be producing county polygons as well.

The code is now checked in, yes it is a hack, but it is a hack of a hack.

mike